5G wifi drop connection when connected PPTP VPN on windows 10, all wifi device cant see the 5G SSID , router need around 2 min to resume the 5G wifi but is no isses when i using 2.4G wifi connect to P

My router Archer C2300 restarts itself when starting VPN connection tunnel through it. My settings: NBN --- Archer VR1600v --- lan cable --- Archer C2300 (AP mode) --- wifi --- PC The only thing chat